One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,8)(5,10)(6,9)(7,13)(12,16)(14,15)(17,18)(19,20)(21,26)(22,27)(23,29)(24,28)(25,33)(30,34)(31,35)(32,36)(37,42)(38,43)(39,47)(40,45)(41,46)(44,48) involution — undirected(1,3)(2,7)(4,12)(5,14)(6,13)(8,15)(9,11)(10,16)(17,19)(18,20)(21,25)(22,38)(23,31)(24,32)(26,33)(27,43)(28,36)(29,35)(30,40)(34,45)(37,47)(39,42)(41,44)(46,48) involution — undirected(1,4,6,5)(2,8,9,10)(3,12,13,14)(7,15,11,16)(17,20)(18,25)(19,29)(21,33)(22,39)(23,35)(24,36)(26,32)(27,44)(28,31)(30,42)(34,41)(37,48)(38,46)(40,43)(45,47)(2,9)(7,11)(8,10)(15,16)(17,21,24,23)(18,26,28,29)(19,25,32,31)(20,33,36,35)(22,37,41,40)(27,42,46,45)(30,38,47,44)(34,43,39,48)(1,5,6,4)(2,10,9,8)(3,12,13,14)(7,15,11,16)(17,22)(18,27)(19,30)(20,34)(21,37)(23,40)(24,41)(25,38)(26,42)(28,46)(29,45)(31,44)(32,47)(33,43)(35,48)(36,39)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.